1.0.3.44: x86-64 print vop preserves 16-byte stack alignment

[sbcl.git] / src / runtime / x86-assem.S

diff --git a/src/runtime/x86-assem.S b/src/runtime/x86-assem.S
index 551841a..ca2b2d6 100644 (file)
--- a/src/runtime/x86-assem.S
+++ b/src/runtime/x86-assem.S
@@ -17,6 +17,7 @@
 #include "sbcl.h"
 #include "validate.h"
 #include "genesis/closure.h"
+#include "genesis/funcallable-instance.h"
 #include "genesis/fdefn.h"
 #include "genesis/static-symbols.h"
 #include "genesis/symbol.h"
@@ -273,6 +274,19 @@ Lstack:
 Ldone: 
        /* Registers eax, ecx, edx, edi, and esi are now live. */
 
+#ifdef LISP_FEATURE_WIN32
+       /* Establish an SEH frame. */
+#ifdef LISP_FEATURE_SB_THREAD
+       /* FIXME: need to save BSP here. */
+#error "need to save BSP here, but don't know how yet."
+#else
+       pushl   BINDING_STACK_POINTER + SYMBOL_VALUE_OFFSET
+#endif
+       pushl   $GNAME(exception_handler_wrapper)
+       pushl   %fs:0
+       movl    %esp, %fs:0
+#endif
+
        /* Alloc new frame. */
        mov     %esp,%ebx       # The current sp marks start of new frame.
        push    %ebp            # fp in save location S0
@@ -288,6 +302,12 @@ Ldone:
 LsingleValue:
        /* A singled value function returns here */
 
+#ifdef LISP_FEATURE_WIN32
+       /* Remove our SEH frame. */
+       popl    %fs:0
+       add     $8, %esp
+#endif
+
 /* Restore the stack, in case there was a stack change. */
        popl    %esp            # c-sp
 
@@ -363,14 +383,14 @@ GNAME(closure_tramp):
 
        .text
        .align  align_4byte,0x90
-       .global GNAME(funcallable_instance_tramp)
-       .type   GNAME(funcallable_instance_tramp),@function
+       .globl GNAME(funcallable_instance_tramp)
+       TYPE(GNAME(funcallable_instance_tramp))
 GNAME(funcallable_instance_tramp):
        movl    FUNCALLABLE_INSTANCE_FUNCTION_OFFSET(%eax),%eax 
        /* KLUDGE: on this platform, whatever kind of function is in %rax
         * now, the first word of it contains the address to jump to. */
        jmp     *CLOSURE_FUN_OFFSET(%eax)
-       .size   GNAME(funcallable_instance_tramp), .-GNAME(funcallable_instance_tramp)
+       SIZE(GNAME(funcallable_instance_tramp))
        
 /*
  * fun-end breakpoint magic
@@ -844,6 +864,43 @@ GNAME(alloc_overflow_edi):
         SIZE(GNAME(alloc_overflow_edi))
 
 
+#ifdef LISP_FEATURE_WIN32
+       /* The guts of the exception-handling system doesn't use
+        * frame pointers, which manages to throw off backtraces
+        * rather badly.  So here we grab the (known-good) EBP
+        * and EIP from the exception context and use it to fake
+        * up a stack frame which will skip over the system SEH
+        * code. */
+       .align  align_4byte
+       .globl  GNAME(exception_handler_wrapper)
+       TYPE(GNAME(exception_handler_wrapper))
+GNAME(exception_handler_wrapper):
+       /* Context layout is: */
+       /* 7 dwords before FSA. (0x1c) */
+       /* 8 dwords and 0x50 bytes in the FSA. (0x70/0x8c) */
+       /* 4 dwords segregs. (0x10/0x9c) */
+       /* 6 dwords non-stack GPRs. (0x18/0xb4) */
+       /* EBP (at 0xb4) */
+       /* EIP (at 0xb8) */
+#define CONTEXT_EBP_OFFSET 0xb4
+#define CONTEXT_EIP_OFFSET 0xb8
+       /* some other stuff we don't care about. */
+       pushl   %ebp
+       movl    0x10(%esp), %ebp        /* context */
+       pushl   CONTEXT_EIP_OFFSET(%ebp)
+       pushl   CONTEXT_EBP_OFFSET(%ebp)
+       movl    %esp, %ebp
+       pushl   0x1c(%esp)
+       pushl   0x1c(%esp)
+       pushl   0x1c(%esp)
+       pushl   0x1c(%esp)
+       call    GNAME(handle_exception)
+       lea     8(%ebp), %esp
+       popl    %ebp
+       ret
+       SIZE(GNAME(exception_handler_wrapper))
+#endif
+
 #ifdef LISP_FEATURE_DARWIN
         .align align_4byte
         .globl GNAME(call_into_lisp_tramp)
@@ -912,39 +969,6 @@ GNAME(post_signal_tramp):
        ret
        SIZE(GNAME(post_signal_tramp))
 
-#ifdef LISP_FEATURE_WIN32
-       /*
-        * This is part of the funky magic for exception handling on win32.
-        * see sigtrap_emulator() in win32-os.c for details.
-        */
-       .globl GNAME(sigtrap_trampoline)
-GNAME(sigtrap_trampoline):
-       pushl   %eax
-       pushl   %ebp
-       movl    %esp, %ebp
-       call    GNAME(sigtrap_wrapper)
-       pop     %eax
-       pop     %eax
-       TRAP
-       .byte   trap_ContextRestore
-       hlt                     # We should never return here.
-        
-       /*
-        * This is part of the funky magic for exception handling on win32.
-        * see handle_exception() in win32-os.c for details.
-        */
-       .globl GNAME(exception_trampoline)
-GNAME(exception_trampoline):
-       pushl   %eax
-       pushl   %ebp
-       movl    %esp, %ebp
-       call    GNAME(handle_win32_exception_wrapper)
-       pop     %eax
-       pop     %eax
-       TRAP
-       .byte   trap_ContextRestore
-       hlt                     # We should never return here.
-#endif
 
         /* fast_bzero implementations and code to detect which implementation
          * to use.